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Comparing libev/Changes (file contents):
Revision 1.155 by root, Thu Dec 31 06:50:16 2009 UTC vs.
Revision 1.294 by root, Sun Jan 5 02:59:36 2014 UTC

1Revision history for libev, a high-performance and full-featured event loop. 1Revision history for libev, a high-performance and full-featured event loop.
2 2
3TODO: ev_loop_wakeup
4TODO: EV_STANDALONE == NO_HASSEL (do not use clock_gettime in ev_standalone)
5TODO: faq, process a thing in each iteration
6TODO: dbeugging tips, ev_verify, ev_init twice
7TODO: ev_break for immediate exit (EVBREAK_NOW?)
8TODO: ev_feed_child_event
9TODO: document the special problem of signals around fork.
10TODO: store pid for each signal
11TODO: document file descriptor usage per loop
12TODO: store loop pid_t and compare isndie signal handler,store 1 for same, 2 for differign pid, clean up in loop_fork
13TODO: embed watchers need updating when fd changes
14TODO: document portbaility requirements for atomic pointer access
15TODO: possible cb aliasing?
16TODO: document requirements for function piinters and calling conventions.
17
18 - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin).
19 - (ecb) support m68k, m88k and sh (patch by Miod Vallat).
20 - use a reasonable fallback for EV_NSIG instead of erroring out
21 when we can't detect the signal set size.
22 - in the absence of autoconf, do not use the clock syscall
23 on glibc >= 2.17 (avoids the syscall AND -lrt on systems
24 doing clock_gettime in userspace).
25 - ensure extern "C" function pointers are used for externally-visible
26 loop callbacks (not watcher callbacks yet).
27 - (ecb) work around memory barriers and volatile apparently both being
28 broken in visual studio 2008 and later (analysed and patch by Nicolas Noble).
29
304.15 Fri Mar 1 12:04:50 CET 2013
31 - destroying a non-default loop would stop the global waitpid
32 watcher (Denis Bilenko).
33 - queueing pending watchers of higher priority from a watcher now invokes
34 them in a timely fashion (reported by Denis Bilenko).
35 - add throw() to all libev functions that cannot throw exceptions, for
36 further code size decrease when compiling for C++.
37 - add throw () to callbacks that must not throw exceptions (allocator,
38 syserr, loop acquire/release, periodic reschedule cbs).
39 - fix event_base_loop return code, add event_get_callback, event_base_new,
40 event_base_get_method calls to improve libevent 1.x emulation and add
41 some libevent 2.x functionality (based on a patch by Jeff Davey).
42 - add more memory fences to fix a bug reported by Jeff Davey. Better
43 be overfenced than underprotected.
44 - ev_run now returns a boolean status (true meaning watchers are
45 still active).
46 - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with
47 libev's EV_ERROR (reported by 191919).
48 - (ecb) add memory fence support for xlC (Darin McBride).
49 - (ecb) add memory fence support for gcc-mips (Anton Kirilov).
50 - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber).
51 - work around some kernels losing file descriptors by leaking
52 the kqueue descriptor in the child.
53 - work around linux inotify not reporting IN_ATTRIB changes for directories
54 in many cases.
55 - include sys/syscall.h instead of plain syscall.h.
56 - check for io watcher loops in ev_verify, check for the most
57 common reported usage bug in ev_io_start.
58 - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET.
59 - always use WSASend/WSARecv directly on windows, hoping that this
60 works in all cases (unlike read/write/send/recv...).
61 - try to detect signals around a fork faster (test program by
62 Denis Bilenko).
63 - work around recent glibc versions that leak memory in realloc.
64 - rename ev::embed::set to ev::embed::set_embed to avoid clashing
65 the watcher base set (loop) method.
66 - rewrite the async/signal pipe logic to always keep a valid fd, which
67 simplifies (and hopefully correctifies :) the race checking
68 on fork, at the cost of one extra fd.
69 - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of
70 inotify-supporting filesystems.
71 - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf
72 versions ignore it before
73 (https://bugzilla.redhat.com/show_bug.cgi?id=908096).
74 - add some untested android support.
75 - enum expressions must be of type int (reported by Juan Pablo L).
76
774.11 Sat Feb 4 19:52:39 CET 2012
78 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as
79 was documented already, but not implemented in the repeating case.
80 - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS.
81 - fix a race where the workaround against the epoll fork bugs
82 caused signals to not be handled anymore.
83 - correct backend_fudge for most backends, and implement a windows
84 specific workaround to avoid looping because we call both
85 select and Sleep, both with different time resolutions.
86 - document range and guarantees of ev_sleep.
87 - document reasonable ranges for periodics interval and offset.
88 - rename backend_fudge to backend_mintime to avoid future confusion :)
89 - change the default periodic reschedule function to hopefully be more
90 exact and correct even in corner cases or in the far future.
91 - do not rely on -lm anymore: use it when available but use our
92 own floor () if it is missing. This should make it easier to embed,
93 as no external libraries are required.
94 - strategically import macros from libecb and mark rarely-used functions
95 as cache-cold (saving almost 2k code size on typical amd64 setups).
96 - add Symbols.ev and Symbols.event files, that were missing.
97 - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now).
98 - fix #3 "be smart about timeouts" to not "deadlock" when
99 timeout == now, also improve the section overall.
100 - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom.
101 - support new EV_API_STATIC mode to make all libev symbols
102 static.
103 - supply default CFLAGS of -g -O3 with gcc when original CFLAGS
104 were empty.
105
1064.04 Wed Feb 16 09:01:51 CET 2011
107 - fix two problems in the native win32 backend, where reuse of fd's
108 with different underlying handles caused handles not to be removed
109 or added to the select set (analyzed and tested by Bert Belder).
110 - do no rely on ceil() in ev_e?poll.c.
111 - backport libev to HP-UX versions before 11 v3.
112 - configure did not detect nanosleep and clock_gettime properly when
113 they are available in the libc (as opposed to -lrt).
114
1154.03 Tue Jan 11 14:37:25 CET 2011
116 - officially support polling files with all backends.
117 - support files, /dev/zero etc. the same way as select in the epoll
118 backend, by generating events on our own.
119 - ports backend: work around solaris bug 6874410 and many related ones
120 (EINTR, maybe more), with no performance loss (note that the solaris
121 bug report is actually wrong, reality is far more bizarre and broken
122 than that).
123 - define EV_READ/EV_WRITE as macros in event.h, as some programs use
124 #ifdef to test for them.
125 - new (experimental) function: ev_feed_signal.
126 - new (to become default) EVFLAG_NOSIGMASK flag.
127 - new EVBACKEND_MASK symbol.
128 - updated COMMON IDIOMS SECTION.
129
1304.01 Fri Nov 5 21:51:29 CET 2010
131 - automake fucked it up, apparently, --add-missing -f is not quite enough
132 to make it update its files, so 4.00 didn't install ev++.h and
133 event.h on make install. grrr.
134 - ev_loop(count|depth) didn't return anything (Robin Haberkorn).
135 - change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
136 - use "(libev) " prefix for all libev error messages now.
137
1384.00 Mon Oct 25 12:32:12 CEST 2010
139 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
140 - ev_embed_stop did not correctly stop the watcher (very good
141 testcase by Vladimir Timofeev).
142 - ev_run will now always update the current loop time - it erroneously
143 didn't when idle watchers were active, causing timers not to fire.
144 - fix a bug where a timeout of zero caused the timer not to fire
145 in the libevent emulation (testcase by Péter Szabó).
146 - applied win32 fixes by Michael Lenaghan (also James Mansion).
147 - replace EV_MINIMAL by EV_FEATURES.
148 - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
149 seems the former is *much* faster than the latter.
150 - linux kernel version detection (for inotify bug workarounds)
151 did not work properly.
152 - reduce the number of spurious wake-ups with the ports backend.
153 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
154 - do async init within ev_async_start, not ev_async_set, which avoids
155 an API quirk where the set function must be called in the C++ API
156 even when there is nothing to set.
157 - add (undocumented) EV_ENABLE when adding events with kqueue,
158 this might help with OS X, which seems to need it despite documenting
159 not to need it (helpfully pointed out by Tilghman Lesher).
160 - do not use poll by default on freebsd, it's broken (what isn't
161 on freebsd...).
162 - allow to embed epoll on kernels >= 2.6.32.
163 - configure now prepends -O3, not appends it, so one can still
164 override it.
165 - ev.pod: greatly expanded the portability section, added a porting
166 section, a description of watcher states and made lots of minor fixes.
167 - disable poll backend on AIX, the poll header spams the namespace
168 and it's not worth working around dead platforms (reported
169 and analyzed by Aivars Kalvans).
170 - improve header file compatibility of the standalone eventfd code
171 in an obscure case.
172 - implement EV_AVOID_STDIO option.
173 - do not use sscanf to parse linux version number (smaller, faster,
174 no sscanf dependency).
175 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
176 - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
177 - add section on accept() problems to the manpage.
178 - rename EV_TIMEOUT to EV_TIMER.
179 - rename ev_loop_count/depth/verify/loop/unloop.
180 - remove ev_default_destroy and ev_default_fork.
181 - switch to two-digit minor version.
182 - work around an apparent gentoo compiler bug.
183 - define _DARWIN_UNLIMITED_SELECT. just so.
184 - use enum instead of #define for most constants.
185 - improve compatibility to older C++ compilers.
186 - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
187 default arguments when compiled as C++.
188 - enable automake dependency tracking.
189 - ev_loop_new no longer leaks memory when loop creation failed.
190 - new ev_cleanup watcher type.
191
1923.9 Thu Dec 31 07:59:59 CET 2009
3 - signalfd is no longer used by default and has to be requested 193 - signalfd is no longer used by default and has to be requested
4 explicitly - this means that easy to catch bugs become hard to 194 explicitly - this means that easy to catch bugs become hard to
5 catch race conditions, but the users have spoken. 195 catch race conditions, but the users have spoken.
6 - point out the unspecified signal mask in the documentation, and 196 - point out the unspecified signal mask in the documentation, and
7 that this is a race condition regardless of EV_SIGNALFD. 197 that this is a race condition regardless of EV_SIGNALFD.
8 - backport inotify code to C89. 198 - backport inotify code to C89.
9 - inotify file descriptors could leak into child processes. 199 - inotify file descriptors could leak into child processes.
10 - ev_stat watchers could keep an errornous extra ref on the loop, 200 - ev_stat watchers could keep an erroneous extra ref on the loop,
11 preventing exit when unregistering all watchers (testcases 201 preventing exit when unregistering all watchers (testcases
12 provided by ry@tinyclouds.org). 202 provided by ry@tinyclouds.org).
13 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration 203 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
14 symbols to make it easier for apps to do their own fd management. 204 symbols to make it easier for apps to do their own fd management.
15 - support EV_IDLE_ENABLE being disabled in ev++.h 205 - support EV_IDLE_ENABLE being disabled in ev++.h
… …
21 - changed minimum glibc requirement from glibc 2.9 to 2.7, for 211 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
22 signalfd. 212 signalfd.
23 - add missing string.h include (Denis F. Latypoff). 213 - add missing string.h include (Denis F. Latypoff).
24 - only replace ev_stat.prev when we detect an actual difference, 214 - only replace ev_stat.prev when we detect an actual difference,
25 so prev is (almost) always different to attr. this might 215 so prev is (almost) always different to attr. this might
26 have caused the probems with 04_stat.t. 216 have caused the problems with 04_stat.t.
27 - add ev::timer->remaining () method to C++ API. 217 - add ev::timer->remaining () method to C++ API.
28 218
293.8 Sun Aug 9 14:30:45 CEST 2009 2193.8 Sun Aug 9 14:30:45 CEST 2009
30 - incompatible change: do not necessarily reset signal handler 220 - incompatible change: do not necessarily reset signal handler
31 to SIG_DFL when a sighandler is stopped. 221 to SIG_DFL when a sighandler is stopped.
32 - ev_default_destroy did not properly free or zero some members, 222 - ev_default_destroy did not properly free or zero some members,
33 potentially causing crashes and memory corruption on repated 223 potentially causing crashes and memory corruption on repeated
34 ev_default_destroy/ev_default_loop calls. 224 ev_default_destroy/ev_default_loop calls.
35 - take advantage of signalfd on GNU/Linux systems. 225 - take advantage of signalfd on GNU/Linux systems.
36 - document that the signal mask might be in an unspecified 226 - document that the signal mask might be in an unspecified
37 state when using libev's signal handling. 227 state when using libev's signal handling.
38 - take advantage of some GNU/Linux calls to set cloexec/nonblock 228 - take advantage of some GNU/Linux calls to set cloexec/nonblock
… …
73 - correctly zero the idx values for arrays, so destroying and 263 - correctly zero the idx values for arrays, so destroying and
74 reinitialising the default loop actually works (patch by 264 reinitialising the default loop actually works (patch by
75 Malek Hadj-Ali). 265 Malek Hadj-Ali).
76 - implement ev_suspend and ev_resume. 266 - implement ev_suspend and ev_resume.
77 - new EV_CUSTOM revents flag for use by applications. 267 - new EV_CUSTOM revents flag for use by applications.
78 - add documentation section about priorites. 268 - add documentation section about priorities.
79 - add a glossary to the dcoumentation. 269 - add a glossary to the documentation.
80 - extend the ev_fork description slightly. 270 - extend the ev_fork description slightly.
81 - optimize a jump out of call_pending. 271 - optimize a jump out of call_pending.
82 272
833.53 Sun Feb 15 02:38:20 CET 2009 2733.53 Sun Feb 15 02:38:20 CET 2009
84 - fix a bug in event pipe creation on win32 that would cause a 274 - fix a bug in event pipe creation on win32 that would cause a
… …
160 do similar changes for event.c. 350 do similar changes for event.c.
161 351
1623.45 Tue Oct 21 21:59:26 CEST 2008 3523.45 Tue Oct 21 21:59:26 CEST 2008
163 - disable inotify usage on linux <2.6.25, as it is broken 353 - disable inotify usage on linux <2.6.25, as it is broken
164 (reported by Yoann Vandoorselaere). 354 (reported by Yoann Vandoorselaere).
165 - ev_stat errornously would try to add inotify watchers 355 - ev_stat erroneously would try to add inotify watchers
166 even when inotify wasn't available (this should only 356 even when inotify wasn't available (this should only
167 have a performance impact). 357 have a performance impact).
168 - ev_once now passes both timeout and io to the callback if both 358 - ev_once now passes both timeout and io to the callback if both
169 occur concurrently, instead of giving timeouts precedence. 359 occur concurrently, instead of giving timeouts precedence.
170 - disable EV_USE_INOTIFY when sys/inotify.h is too old. 360 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
… …
238 - enable inlining with gcc versions 2 and 3. 428 - enable inlining with gcc versions 2 and 3.
239 - work around broken poll implementations potentially 429 - work around broken poll implementations potentially
240 not clearing revents field in ev_poll (Brandon Black) 430 not clearing revents field in ev_poll (Brandon Black)
241 (no such systems are known at this time). 431 (no such systems are known at this time).
242 - work around a bug in realloc on openbsd and darwin, 432 - work around a bug in realloc on openbsd and darwin,
243 also makes the errornous valgrind complaints 433 also makes the erroneous valgrind complaints
244 go away (noted by various people). 434 go away (noted by various people).
245 - fix ev_async_pending, add c++ wrapper for ev_async 435 - fix ev_async_pending, add c++ wrapper for ev_async
246 (based on patch sent by Johannes Deisenhofer. 436 (based on patch sent by Johannes Deisenhofer).
247 - add sensible set method to ev::embed. 437 - add sensible set method to ev::embed.
248 - made integer constants type int in ev.h. 438 - made integer constants type int in ev.h.
249 439
2503.2 Wed Apr 2 17:11:19 CEST 2008 4403.2 Wed Apr 2 17:11:19 CEST 2008
251 - fix a 64 bit overflow issue in the select backend, 441 - fix a 64 bit overflow issue in the select backend,

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